JP3113874U - Rapid air valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a quick air valve capable of realizing rapid air supply / exhaust while having a simple structure and a small size.
A quick air valve (1) includes a float valve body (2) that floats in water or on the surface of a water, a floating valve body (3) that overlaps with the float valve body (2), and a float valve body (2) and a floating valve body that are opened at the upper end. 3 and a valve box 5 having an inlet 4 for introducing water into the inside, and a valve lid 6 provided at the upper end of the valve box 5. The valve box 5 includes an inner case 7, an outer case 8, and lifting / lowering means 9 that displaces the inner case 7 to be movable up and down with respect to the outer case 8.
[Selection] Figure 1

Description

  The present invention exhausts air collected in a distribution pipe such as a water pipe for supplying tap water, or a pipeline for flowing agricultural water, or other gas (hereinafter simply referred to as “air”), and intake air. And a quick air valve that exhausts under pressure.

  FIG. 8 shows the appearance of a conventional quick air valve A. The quick air valve A includes a valve box V in which the float valve body and the floating valve body described above are installed, and an umbrella-like cover C attached to cover a valve lid that closes the upper end of the valve box V. It is attached via a secondary valve S to the upper end of the C-shaped tube T branched upward. When cleaning the inside of the valve box V, etc., the handle H of the sub valve S is operated so that water does not flow into the valve box V from the water pipe P. Shut off. In this state, the lid that is not shown in the figure is removed from the valve box V together with the umbrella cover C, and the valve box V is disassembled.

  However, since the space for providing the sub-valve S between the rapid air valve A and the letter tube T is indispensable, the total height including the letter tube T is increased. For this reason, the position of the valve box V moves away from the water pipe P, and water hardly flows in the vicinity of the valve box V. Therefore, there is a problem that the water near the valve box V is easily frozen in winter.

  In addition, the techniques disclosed in the following Patent Documents 1 to 4 are useful for suppressing the total height of the quick air valve by omitting the sub valve. In the techniques according to Patent Documents 1 to 3, an outer cylinder is disposed outside the valve box, and water is introduced into the valve box through inlets formed in both the valve box and the outer cylinder. When cleaning the inside or the like, the water flowing into the valve box via the inlet is shut off by moving either the valve box or the outer cylinder with respect to the other. In the technique according to Patent Document 4, the inlet port formed in the valve box in a state where the valve box is raised is blocked by the inner peripheral surface of the valve lid, thereby blocking water flowing into the valve box through the inlet port. To do.

However, the techniques disclosed in Patent Documents 1 to 4 have a problem that the manufacturing cost of the air valve itself is increased because the number of parts is large and the structure is complicated. The rapid air valve is required to be downsized.
JP-A-10-299927 Japanese Patent Laid-Open No. 10-299928 JP 10-318395 A Japanese Patent Laid-Open No. 10-281319

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a rapid air valve that can realize rapid air supply and exhaust while having a simple structure and a small size.

  The present invention has a float valve body that floats on water, a floating valve body that overlaps the float valve body, and an inlet that houses the float valve body and the floating valve body and introduces water therein. A valve box and a valve lid provided at the upper end of the valve box, the floating valve body is provided with a vent hole that is opened and closed by the float valve body, and the valve lid is opened and closed by the floating valve body The valve box has an upper end and a lower end, forms the introduction port near the upper end, and has a flange shape around the lower end. An inner case extending the water stop valve body, and a lower end opening having a mouth edge as a valve seat of the water stop valve body, and the introduction from the lower end opening around the inner case inserted into the lower end opening An outer case that secures a gap to the mouth, and the inner case to the outer case. And when the inner case is lowered by the elevating means, the gap between the water stop valve body and the lip of the lower end opening is opened, and the inner case is raised. The water stop valve body closes the lower end opening.

  Further, in the quick air according to the present invention, the inner case is inserted into the outer case so as to be rotatable around a vertical axis, and the elevating means is connected to the outer screw formed near the upper end of the inner case. The female screw formed on the inner case is screwed together, and a water tightness between the lower side of the female screw of the outer case and the inner case is secured by a sealing material.

  Furthermore, the rapid air according to the present invention is characterized in that the inner case is moved up and down by joining the valve lid to the inner case and rotating the inner case together with the valve lid around a vertical axis.

  Further, the quick air according to the present invention has a small hole for introducing water into the inner case from the upper side of the water stop valve body near the lower end of the inner case. It is characterized in that it is set smaller than the above.

  Furthermore, the rapid air according to the present invention includes a cover that covers the periphery of the valve lid, and a heat insulating material provided on the inner surface of the cover.

  Since the quick air valve according to the present invention forms a valve box with only two members, an inner case and an outer case, the number of parts can be minimized. Therefore, in addition to reducing the manufacturing cost of the rapid air valve, the structure of the rapid air valve can be greatly simplified as compared with the prior art, so that assembly work in the manufacturing process or disassembly work related to cleaning, etc. Can be easily obtained, or an advantage that failure is less likely to occur can be obtained.

  In particular, when applying a structure in which a female screw formed on the outer case is screwed to a male screw formed near the upper end of the inner case as a lifting means for raising and lowering the inner case, for example, the outer case is bolted to a clove tube If this is the case, the inner case can be stably supported by the outer case. In this case, components for attaching the inner case to the outer case are unnecessary, and a guide member for raising and lowering the inner case straight can be omitted.

  In addition, since the quick air valve comprises both the valve box and the guide means with only two members, the inner case and the outer case, the number of joints between the inner case and the outer case can be reduced to a minimum. Can do. In addition, a sealing material is indispensable to prevent water from the water pipe from entering the place where the inner case and outer case are screwed together, or from leaking to the outside of the valve box through this screwed place. However, it is sufficient to provide such a sealing material only between the lower side of the female screw and the inner case. In addition, when the valve lid is joined to the inner case, if the valve lid is rotated from the outside of the valve box, the inner case can be rotated and the inner case can be raised and lowered accordingly. A special handle or the like is not particularly necessary for rotating from the outside. Therefore, the structure of the rapid air valve can be further simplified, and the above effects can be achieved remarkably.

  Furthermore, according to the quick air valve, the amount of water that can flow into the gap from the lower end opening of the outer case to the inlet of the inner case is determined by the width of the lower end opening of the outer case. Compared with the case where the introduction port is formed in the lower end surface of the outer cylinder, it can be greatly increased. Further, since the inlet is formed near the upper end of the inner case, there is an advantage that the diameter of the quick air valve does not need to be increased.

  Furthermore, according to the quick air valve according to the present invention, since the heat insulating material is provided on the inner surface of the cover that covers the upper surface and the side peripheral surface of the valve lid, it is possible to prevent dew condensation around the quick air valve in winter. Can be prevented.

  A quick air valve according to an embodiment of the present invention will be described with reference to the drawings. The same designations are used for elements already described in the prior art, and illustration or description thereof is omitted.

  As shown in FIGS. 1 and 2, the quick air valve 1 includes a float valve body 2 that floats underwater or on the surface of the water, a floating valve body 3 that overlaps with the float valve body 2, and an open upper end that opens to the inside. 2 and a floating valve body 3 and a valve box 5 having an introduction port 4 for introducing water into the inside, and a valve lid 6 provided at the upper end of the valve box 5. The valve box 5 includes an inner case 7, an outer case 8, and an elevating means 9 that displaces the inner case 7 so as to be movable up and down with respect to the outer case 8.

  The floating valve body 3 is provided with a vent hole 10 that is opened and closed when the float valve body 2 floats and sinks in water introduced into the inner case 7. The valve lid 6 is provided with an air supply / exhaust port 11 that is opened and closed when the floating valve body 3 floats and sinks in the water. The vent hole 10 is a small hole whose opening area is set smaller than that of the air supply / exhaust port 11, and is arranged so as to be eccentric toward the side portion of the floating valve element 3. Both the vent hole 10 and the air supply / exhaust port 11 are open to the atmosphere.

  According to the quick air valve 1, when the inner case 7 is filled with air that almost occupies its capacity, the floating valve body 3 and the floating valve body 3 are connected to the inner case 7 as shown in FIG. 1. It sinks to the vicinity of the lower end, and the air supply / exhaust port 11 of the valve lid 6 is opened. In this state, when the inner case 7 is lowered with respect to the outer case 8 by operating the elevating means 9 as described later, the edge of the water stop valve body 12 of the inner case 7 and the lower end opening 13 of the outer case 8. The water in the water pipe is introduced into the inner case 7 through the gap 14 extending from the lower end opening 13 of the outer case 8 to the inlet 4 of the inner case 7, and immediately from the air supply / exhaust port 11. Discharged.

  Alternatively, when air remains in the water pipe in the state shown in FIG. 1, the air is rapidly discharged through the gap 14, the introduction port 4, and the supply / exhaust port 11 in order. Conversely, when the internal pressure of the water pipe decreases, the air is sucked into the water pipe through the air supply / exhaust port 11, the introduction port 4, and the gap 14 in order.

  Further, as the inside of the inner case 7 is filled with water, the floating valve body 3 floats together with the float valve body 2, and when the floating valve body 3 comes into close contact with the valve lid 6 as shown in FIG. As a result, the air supply / exhaust port 11 of the valve lid 6 is closed. At the same time, the air vent 10 of the floating valve body 3 is also closed by the float valve body 2. In this state, air mixed with water becomes air bubbles and enters the inner case 7, and when the water surface inside the inner case 7 slightly falls, only the float valve body 2 sinks, and the float valve body 2 Is detached from the floating valve body 3. The floating valve body 3 is pressed by the internal pressure of the water pipe and keeps in close contact with the valve lid 6. Thereby, since only the vent hole 10 is opened, the air that has entered the valve box 5 is released to the atmosphere via the vent hole 10.

  Next, as shown in FIG. 3, when the elevating means 9 is operated as described later to raise the inner case 7 relative to the outer case 8, the lower end opening 13 of the outer case 8 becomes a flange-shaped water stop. The valve body 12 is blocked. Since the water stop valve body 12 extends from the vicinity of the lower end of the inner case 7, the water in the water pipe that is about to flow into the lower end opening 13 of the outer case 8 can be reliably stopped. If the valve lid 6 is removed from the valve box 5 in this state, for example, the operation of cleaning or replacing the valve box 5, the float valve body 2, or the floating valve body 3 can be performed.

  As shown in FIG. 1 to FIG. 4, the outer case 8 has a flange 16 extending from the vicinity of the upper end of the cylindrical body portion 15 to the periphery, and the quick air valve 1 is attached to the letter pipe of the water pipe. The flange 15 can be tightened with a bolt 16 on the flange on the side of the letter tube while the body part 15 of the outer case 8 is immersed in the letter tube.

  The valve lid 6 is a ring-shaped member having an air supply / exhaust port 11 formed at the center thereof, and is fitted into the upper end of the inner case 7. The valve lid 6 is fixed to the upper end of the inner case 7 with a plurality of bolts 17, and a cover 18 that covers the upper surface and the peripheral surface of the quick air valve 1 is further fixed to the bolts 17. In addition, a heat insulating material 19 is provided on the inner surface of the cover 18 in order to prevent condensation from freezing around the valve lid 6 in winter. Reference numeral 20 indicates a sealing material for ensuring watertightness between the valve lid 6 and the inner peripheral surface of the inner case 7.

  As shown in FIGS. 5 and 6, the inner case 7 is formed with four inlets 4 near its upper end, and a flange-shaped water stop valve body 12 extends around the lower end. Although the illustrated water stop valve body 12 is arranged slightly above the lower end of the inner case 7, the position of the water stop valve body 12 may be moved closer to the lower end of the inner case 7. The upper edge portion and the lower edge portion of the introduction port 4 are inclined surfaces that rise as they go inward of the inner case 7.

  This smoothly guides water or air flowing upward from the lower end opening 13 of the outer case 8 toward the inlet 4 of the inner case 7, and the floating valve element 3 together with the float valve element 2 near the lower end of the inner case 7. The water or air introduced into the inner case 7 in a state where the water has settled is not obstructed by the float valve body 2 or the floating valve body 3 and enters the atmosphere through the air supply / exhaust port 11 of the valve lid 6. It is intended to be discharged quickly.

  Further, the amount of water that can flow into the gap 14 from the lower end opening 13 of the outer case 8 to the introduction port 4 of the inner case 7 is determined by the size of the lower end opening 13 of the outer case 8, so that, for example, the lower end surface of the valve box or outer cylinder Compared with the case where the inlet 4 is formed, the flow rate of water or air flowing into the valve box 5 at a time can be greatly increased. Further, since the introduction port 4 is formed near the upper end of the inner case 7, there is an advantage that the diameter of the quick air valve 1 does not need to be increased. Reference numeral 21 denotes a recess formed in the inner peripheral surface of the inner case 7 in a range from the vicinity of the lower end thereof to the lower edge of the inlet 4.

  Furthermore, the inner case 7 has a small hole 22 for introducing water into the inside from the upper side of the water stop valve body 12 near the lower end thereof. This is due to the following reason. Immediately after water begins to flow into the inner case 7 from the inlet 4 in a state where the inner case 7 is filled with air, the water flows above the floating valve body 3 that has settled to the vicinity of the lower end of the inner case 7. Flow down. If the floating of the floating valve body 3 is delayed by this hydraulic force, water may be ejected from the air supply / exhaust port 11. Therefore, if a part of this water can be introduced into the inner case 7 through the small hole 22 before the water flowing into the gap 14 from the lower end opening 13 reaches the introduction port 4, the floating valve body 3 together with the float valve body 2 in advance. Is surfaced.

  On the other hand, the opening area of the small hole 22 need not be limited in terms of quantity, but is preferably set smaller than that of the introduction port 4. This is due to the following reason. As described above, when the air staying in the water pipe is discharged, a part of the air in the water pipe reaches the inside of the inner case 7 from the small hole 22 before reaching the inlet 4 from the lower end opening 13. Flow into. The air escapes upward by the recess 21, but if the opening area of the small hole 22 is increased too much, the floating valve element 3 is pushed up together with the float valve element 2 by the momentum of the air flowing from the small hole 22. . As a result, the air supply / exhaust port 11 may be closed by the idle valve body 3 and air discharge may be hindered.

  Since the quick air valve 1 described above comprises the valve box 5 with only two members, the inner case 7 and the outer case 8, the number of parts can be minimized. Therefore, in addition to reducing the manufacturing cost of the rapid air valve 1, the structure can be greatly simplified as compared with the conventional technology, so that assembly work in the manufacturing process or disassembly work related to cleaning, etc. can be easily performed. Can do.

  The elevating means 9 is not limited as long as it is a mechanism that can realize the elevating operation of the inner case 7. For example, a female screw 24 formed on the outer case 8 is screwed into a male screw 23 formed near the upper end of the inner case 7. A combination may be applied. In this case, a slight gap is required between the inner case 7 and the outer case 8 so that the inner case 7 can freely rotate about the vertical axis (the geometric center line of the inner case 7). The seal material 25 ensures water tightness between the lower side of the female screw 24 of the outer case 8 and the inner case 7 so that no water leaks from such a gap.

  Further, as described above, the outer case 8 is fixed to the letter tube with the bolts 16, so that the inner case 7 can be stably supported by the outer case 8. Therefore, parts for attaching the inner case 7 to the outer case 8 are unnecessary, and a guide member for raising and lowering the inner case 7 straight can be omitted. Moreover, since the valve lid 6 is joined to the inner case 7, the lifting means 9 can be operated only by rotating the valve lid 6 from the outside of the valve box 5. The inner case 7 can be moved up and down by rotating. Therefore, in order to rotate the inner case 7 from the outside of the valve box 5, in other words, a dedicated handle or the like for operating the lifting means 9 is not particularly necessary.

  Moreover, since it is not necessary to project the auxiliary valve into the water pipe as in the prior art, for example, when all the water from the water pipe is extracted and the interior is cleaned, a brush or the like is inserted into the water pipe. There is an advantage that a brush or the like does not get caught in the auxiliary valve.

  It should be noted that the present invention can be implemented in a mode in which various improvements, modifications, and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. For example, as shown in FIG. 7, a spherical float valve element 2 may be applied. In this case, the vent hole 10 is arranged at a position penetrating the center of the floating valve body 3. Moreover, the introduction port 4, the recessed part 21, or the small hole 22 does not necessarily need to be four, and may be increased or decreased to three or less or five or more, respectively. Moreover, as a material of the quick air valve 1, stainless steel may be applied to the valve box 5 or the valve lid 6, and ABS resin or polypropylene resin may be applied to the float valve body 2 or the floating valve body 3. There is no need to limit the material.

  The present invention is a technique useful for achieving miniaturization of the quick air valve and the water pipe to which the quick air valve is attached. Moreover, the quick air valve plug according to the present invention is not limited to a water pipe, and can discharge air from any distribution pipe or tank, or conversely, can suck air.

Sectional drawing which shows an example of the operation | movement in the open state of the rapid air valve which concerns on embodiment of this invention. Sectional drawing which shows the other example of the operation | movement in the open state of the rapid air valve which concerns on embodiment of this invention. Sectional drawing which shows the operation example in the closed state of the principal part of the quick air valve which concerns on embodiment of this invention. The top view which saw through the principal part of the rapid air valve which concerns on embodiment of this invention. Sectional drawing of the inner case applied to the rapid air valve which concerns on embodiment of this invention. AA sectional drawing of FIG. Sectional drawing which shows the modification of the rapid air valve which concerns on embodiment of this invention. The side view which shows the construction example of the quick air valve of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Quick air valve 2 Float valve body 3 Floating valve body 4 Inlet port 5 Valve box 6 Valve cover 7 Inner case 8 Outer case 9 Lifting means 10 Vent hole 11 Supply / exhaust port 12 Water stop valve body 13 Lower end opening 14 Gap 18 Cover 19 Thermal insulation material 22 Small hole 23 Male screw 24 Female screw 25 Sealing material

Claims (5)

A float valve body floating on water, a floating valve body overlying the float valve body, a valve box having an inlet for accommodating the float valve body and the floating valve body therein and introducing water into the interior; A valve lid provided at the upper end of the valve box, the floating valve body is provided with a vent that is opened and closed by the float valve body, and the supply and exhaust air that is opened and closed by the floating valve body in the valve lid A quick air valve with a mouth,
The valve box has an upper end and a lower end, forms the inlet near the upper end, and an inner case that extends a flange-like water stop valve body around the lower end;
An outer case having a lower end opening with a mouth edge as a valve seat of the water stop valve body, and securing a gap from the lower end opening to the introduction port around the inner case inserted into the lower end opening;
Elevating means capable of raising and lowering the inner case relative to the outer case;
When the inner case is lowered by the elevating means, the gap between the water stop valve body and the opening edge of the lower end opening is opened, and when the inner case is raised, the water stop valve body is opened at the lower end opening. Quick air valve, characterized by blocking.   The inner case is inserted into the outer case so as to be rotatable around a vertical axis, and the elevating means is screwed into a male screw formed in the vicinity of the upper end of the inner case with a female screw formed in the outer case, The rapid air valve according to claim 1, wherein a water tightness between the lower side of the female screw of the outer case and the inner case is secured by a sealing material.   The rapid air valve according to claim 2, wherein the inner case is moved up and down by joining the valve lid to the inner case and rotating the inner case together with the valve lid around a vertical axis.   The inner case has a small hole for introducing water into the inside from the upper side of the water stop valve body near the lower end thereof, and the opening area of the small hole is set smaller than that of the introduction port. The rapid air valve according to any one of claims 1 to 3.   The rapid air valve according to any one of claims 1 to 4, further comprising: a cover that covers the periphery of the valve lid; and a heat insulating material provided on an inner surface of the cover.

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